Multi-core optical fiber coupler based on three-dimensional waveguide and preparation method

Abstract

The invention provides a multi-core optical fiber coupler based on a three-dimensional waveguide and a preparation method. The multiplexing and demultiplexing of the multi-core optical fiber are achieved through the three-dimensional waveguide chip, the input end of the three-dimensional waveguide chip is connected with the multi-core optical fiber head, and the output end of the three-dimensional waveguide chip is connected with the single-mode optical fiber head, so the manufacturing difficulty is greatly reduced, and batch production of the three-dimensional waveguide type multi-core optical fiber coupler with low insertion loss is realized. By optimizing the optical waveguide arrangement of the three-dimensional waveguide chip, the optical waveguide spacing of the output end of the three-dimensional waveguide chip is reduced, the bending radius of the waveguide is increased under the condition that the waveguide length is not increased, and the waveguide loss is effectively reduced. The capillary glass tube adopted by the invention can be used for conveniently and quickly preparing a multi-core optical fiber head and a single-mode optical fiber bundle head, so that the coupling efficiency of the multi-core optical fiber coupler is improved, the operation is convenient, the coupler can be upgraded to an automatic coupling system, the product yield, expandability and precision are improved, and stable coupling of a wave optical fiber and a three-dimensional waveguide is realized.

Description

technical field [0001] The invention belongs to the technical field of optical transmission devices, and in particular relates to a multi-core optical fiber coupler based on a three-dimensional waveguide and a preparation method. Background technique [0002] With the commercialization of 5G technology and the continuous development of IoT smart cities, the demand for optical communication capacity continues to increase. In single-mode optical fiber links, technical means such as time division multiplexing, wavelength division multiplexing, and polarization multiplexing are used to expand system capacity, but with the growth of digital data services, the required bandwidth density increases sharply, making SMF links unable to Meet the needs. Space-division multiplexing based on multi-core optical fiber is one of the most effective methods to solve the capacity limitation of SMF links. In recent years, multi-core optical fiber communication systems have achieved higher bandw...

AI Technical Summary

Problems solved by technology

The output end of the waveguide chip in this patent is a one-dimensional optical waveguide arrangement, resulting in a one-dimensional arrangement of optical waveguides at the output end, the waveguide in the middle has a large bending radius, the corresponding waveguide loss is relatively small, and the waveguides on both sides have a small bending radius. The corresponding waveguide bending loss is relatively large, and the multi-core optical fiber coupler prepared by using a three-dimensional waveguide chip arranged in a one-dimensional optical waveguide at the output end has high insertion loss, and the uniformity of the loss of each channel of the multi-core optical fiber coupler cannot be guaranteed.

Images